Determination of Interfacial Tension of Binary Mixtures of n-alkanes + CH\(_4\) and n-alkanes + CO\(_2\) Using Density Gradient Theory and Peng-Robinson Equation of State at Elevated Temperatures and Pressures
Rajeev Ranjan Deo Pandey
University Department of Physics, Ranchi University, Ranchi, India.
Bipin Kumar *
Sona Devi University, Ghatsila, East Singhbhum, Jharkhand, India.
Manoranjan Bar
Sona Devi University, Ghatsila, East Singhbhum, Jharkhand, India.
Sanjay Kumar
Department of Physics, K.O. College, Gumla, Ranchi University, Ranchi, India.
Binay Prakash Akhouri
Department of Physics, Suraj Singh Memorial College, Ranchi University, Ranchi, India.
*Author to whom correspondence should be addressed.
Abstract
The interfacial tensions of alkanes in the presence of CH4 and CO2 were predicted using the model taken as a combination of Density Gradient theory and Peng-Robinson equation of state and compared with existing simulation data. The main aim of this work was to make a progress in modeling the IFTs between diverse n-alkanes and CH4 and CO2 natural gases. Several statistical measures and graphical descriptions were employed to aid the accuracy analysis of the proposed model. The statistical measures indicate a complex relationship among thermal conditions, model selection, and performance metrics, which can be observed by examining the tables presented in this work. Overall, the results indicate that the Peng-Robinson equation effectively predicted the interfacial tensions.
Keywords: Density gradient theory, interfacial tension, n-alkanes, natural gases and statistical errors